The 50 or so professional players in one of Riot Games’ “League of Legends” circuits have voted to create what is thought to be the first e-sports players association in North America.

The players also voted to hire attorney Hal Biagas, who formerly worked at the National Basketball Players Association, to run the new organization.

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The National Labor Relations Act prohibits employers from providing financial and other support for employee unions, said Bill Gould, a Stanford Law School professor and former chairman of the NLRB. He added that he has not heard of such an association in sports before.